Toy building brick



FIG. 1 is a top front isometric view of a toy building block showing my new design;

FIG. 2 is a rear bottom isometric view of the toy building block;

FIG. 3 is a left side view of the toy building block;

FIG. 4 is a right side view of the toy building block;

FIG. 5 is a top view of the toy building block;

FIG. 6 is a rear view of the toy building block; and,

FIG. 7 is a cross-sectional view of the toy building block taken along line 7-7 of FIG. 3 to show a depth of openings extending into the toy building block. 

CLAIM The ornamental design for a toy building block, as shown and described. 